Answer:
D. Cytokines
Explanation:
I would utilize Cytokines to recruit more leukocytes to the battle.
Cytokines are important chemical messengers that act via receptors in the immune system of the body. They are a group of proteins made by various immune cells. Immune cells communicate through Cytokines in regulating immune response
Artificial selection is the breeding of the best species by humans. For example, the fastest horse or something like that. This means breeding with species with the traits that produce offspring with the desired traits. To do this variation is needed. Not all species are going to have the desired traits but not all are going to have the undesired traits. However, if there is no variation, all animals of the same species are either going to have the unwanted traits or the desired traits. Now, if they all have the traits that us, humans, don't want, then such a concept and process like artificial selection would not exist.
Different rate of synapse production in different areas of the brain indicate that:
1. the different areas of the brain does not develop at the same time.
2. there is difference in timing of development of different skills and behavior categories and
3. different rate of synapses elimination occur in the brain.
The human brain start maturing before birth and continue to grow until about the age of twenty five. Even after this age, adult brain continues to mature as a result of the learning experiences that people are exposed to.
Horses only have 1 stomach
The statement, Denaturation of dna is a necessary step in southern blotting procedure because it separates double stranded dna into single stranded dna, is true.